Why is there a [1] in front of my schematic sheet name?

There is a [1] in front of my schematic sheet name in the Projects panel. How do I get the normal filename back?

Starting in Version: 21
Up to Version: Current

Solution Details

• In AD21 and newer versions, this setting can be found under Project ► Project Options ► under the Options tab in the General section.

• This setting can also be found in the Schematic editor under Tools ► Annotation ► Number Schematic Sheets.